Why is there partial relaxation in graph (c)?
A) Calcium ion release is slow.
B) The muscle is starting to fatigue.
C) Stimulation intensity is fluctuating.
D) ATP reserves are cycling.
E) Nerve stimulation frequency is below maximum.
Ans: E) Nerve stimulation frequency is below maximum.
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Which of the following statements best describes mollusks?
A) Mollusks include gastropods, bivalves, and cephalopods; they have a reduced coelom, and many move at a sluggish pace. B) Mollusks include gastropods, bivalves, and cephalopods; many move at a sluggish pace, and all are aquatic. C) Mollusks include gastropods and bivalves; several bivalves are terrestrial with adaptations to withstand severe dehydration. D) Mollusks include gastropods and bivalves, have a mantle, and all are aquatic.
The hypothalamic-pituitary portal system transports blood and neurohormones between the
A) Hypothalamus and the heart. B) Hypothalamus and the pituitary gland (after returning to the heart). C) Hypothalamus and the posterior pituitary. D) Hypothalamus and the anterior pituitary.
The opposite process of glycogenesis is ________.
A. gluconeogenesis B. glyconeogenesis C. glycogenolysis D. glycolysis
A passageway connecting neighboring osteocytes in an osteon is a ________.
A. central canal B. canaliculus C. lamella D. osteocanal E. lacuna